<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Microsoft FrontPage Express 2.0">
<title>Television Interface Adaptor - Address Summary</title>
</head>
<body bgcolor="#FFFFFF">
<!-- BEGIN WAYBACK TOOLBAR INSERT -->

<script type="text/javascript" src="http://staticweb.archive.org/js/disclaim-element.js" ></script>
<script type="text/javascript" src="http://staticweb.archive.org/js/graph-calc.js" ></script>
<script type="text/javascript" src="http://staticweb.archive.org/jflot/jquery.min.js" ></script>
<script type="text/javascript">
//<![CDATA[
var firstDate = 820454400000;
var lastDate = 1325375999999;
var wbPrefix = "http://web.archive.org/web/";
var wbCurrentUrl = "http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm";

var curYear = -1;
var curMonth = -1;
var yearCount = 16;
var firstYear = 1996;
var imgWidth=400;
var yearImgWidth = 25;
var monthImgWidth = 2;
var trackerVal = "none";
var displayDay = "24";
var displayMonth = "Sep";
var displayYear = "2006";
var prettyMonths = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];

function showTrackers(val) {
	if(val == trackerVal) {
		return;
	}
	if(val == "inline") {
		document.getElementById("displayYearEl").style.color = "#ec008c";
		document.getElementById("displayMonthEl").style.color = "#ec008c";
		document.getElementById("displayDayEl").style.color = "#ec008c";		
	} else {
		document.getElementById("displayYearEl").innerHTML = displayYear;
		document.getElementById("displayYearEl").style.color = "#ff0";
		document.getElementById("displayMonthEl").innerHTML = displayMonth;
		document.getElementById("displayMonthEl").style.color = "#ff0";
		document.getElementById("displayDayEl").innerHTML = displayDay;
		document.getElementById("displayDayEl").style.color = "#ff0";
	}
   document.getElementById("wbMouseTrackYearImg").style.display = val;
   document.getElementById("wbMouseTrackMonthImg").style.display = val;
   trackerVal = val;
}
function getElementX2(obj) {
	var thing = jQuery(obj);
	if((thing == undefined) 
			|| (typeof thing == "undefined") 
			|| (typeof thing.offset == "undefined")) {
		return getElementX(obj);
	}
	return Math.round(thing.offset().left);
}
function trackMouseMove(event,element) {

   var eventX = getEventX(event);
   var elementX = getElementX2(element);
   var xOff = eventX - elementX;
	if(xOff < 0) {
		xOff = 0;
	} else if(xOff > imgWidth) {
		xOff = imgWidth;
	}
   var monthOff = xOff % yearImgWidth;

   var year = Math.floor(xOff / yearImgWidth);
	var yearStart = year * yearImgWidth;
   var monthOfYear = Math.floor(monthOff / monthImgWidth);
   if(monthOfYear > 11) {
       monthOfYear = 11;
   }
   // 1 extra border pixel at the left edge of the year:
   var month = (year * 12) + monthOfYear;
   var day = 1;
	if(monthOff % 2 == 1) {
		day = 15;
	}
	var dateString = 
		zeroPad(year + firstYear) + 
		zeroPad(monthOfYear+1,2) +
		zeroPad(day,2) + "000000";

	var monthString = prettyMonths[monthOfYear];
	document.getElementById("displayYearEl").innerHTML = year + 1996;
	document.getElementById("displayMonthEl").innerHTML = monthString;
	// looks too jarring when it changes..
	//document.getElementById("displayDayEl").innerHTML = zeroPad(day,2);

	var url = wbPrefix + dateString + '/' +  wbCurrentUrl;
	document.getElementById('wm-graph-anchor').href = url;

   //document.getElementById("wmtbURL").value="evX("+eventX+") elX("+elementX+") xO("+xOff+") y("+year+") m("+month+") monthOff("+monthOff+") DS("+dateString+") Moy("+monthOfYear+") ms("+monthString+")";
   if(curYear != year) {
       var yrOff = year * yearImgWidth;
       document.getElementById("wbMouseTrackYearImg").style.left = yrOff + "px";
       curYear = year;
   }
   if(curMonth != month) {
       var mtOff = year + (month * monthImgWidth) + 1;
       document.getElementById("wbMouseTrackMonthImg").style.left = mtOff + "px";
       curMonth = month;
   }
}
//]]>
</script>

<style type="text/css">body{margin-top:0!important;padding-top:0!important;min-width:800px!important;}#wm-ipp a:hover{text-decoration:underline!important;}</style>
<div id="wm-ipp" style="display:none; position:relative;padding:0 5px;min-height:70px;min-width:800px; z-index:9000;">
<div id="wm-ipp-inside" style="position:fixed;padding:0!important;margin:0!important;width:97%;min-width:780px;border:5px solid #000;border-top:none;background-image:url(http://staticweb.archive.org/images/toolbar/wm_tb_bk_trns.png);text-align:center;-moz-box-shadow:1px 1px 3px #333;-webkit-box-shadow:1px 1px 3px #333;box-shadow:1px 1px 3px #333;font-size:11px!important;font-family:'Lucida Grande','Arial',sans-serif!important;">
   <table style="border-collapse:collapse;margin:0;padding:0;width:100%;"><tbody><tr>
   <td style="padding:10px;vertical-align:top;min-width:110px;">
   <a href="http://wayback.archive.org/web/" title="Wayback Machine home page" style="background-color:transparent;border:none;"><img src="http://staticweb.archive.org/images/toolbar/wayback-toolbar-logo.png" alt="Wayback Machine" width="110" height="39" border="0"/></a>
   </td>
   <td style="padding:0!important;text-align:center;vertical-align:top;width:100%;">

       <table style="border-collapse:collapse;margin:0 auto;padding:0;width:570px;"><tbody><tr>
       <td style="padding:3px 0;" colspan="2">
       <form target="_top" method="get" action="http://wayback.archive.org/web/form-submit.jsp" name="wmtb" id="wmtb" style="margin:0!important;padding:0!important;"><input type="text" name="url" id="wmtbURL" value="http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" style="width:400px;font-size:11px;font-family:'Lucida Grande','Arial',sans-serif;" onfocus="javascript:this.focus();this.select();" /><input type="hidden" name="type" value="replay" /><input type="hidden" name="date" value="20060924094918" /><input type="submit" value="Go" style="font-size:11px;font-family:'Lucida Grande','Arial',sans-serif;margin-left:5px;" /><span id="wm_tb_options" style="display:block;"></span></form>
       </td>
       <td style="vertical-align:bottom;padding:5px 0 0 0!important;" rowspan="2">
           <table style="border-collapse:collapse;width:110px;color:#99a;font-family:'Helvetica','Lucida Grande','Arial',sans-serif;"><tbody>
			
           <!-- NEXT/PREV MONTH NAV AND MONTH INDICATOR -->
           <tr style="width:110px;height:16px;font-size:10px!important;">
           	<td style="padding-right:9px;font-size:11px!important;font-weight:bold;text-transform:uppercase;text-align:right;white-space:nowrap;overflow:visible;" nowrap="nowrap">
               
		                <a href="http://web.archive.org/web/20050323162009/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" style="text-decoration:none;color:#33f;font-weight:bold;background-color:transparent;border:none;" title="23 Mar 2005"><strong>MAR</strong></a>
		                
               </td>
               <td id="displayMonthEl" style="background:#000;color:#ff0;font-size:11px!important;font-weight:bold;text-transform:uppercase;width:34px;height:15px;padding-top:1px;text-align:center;" title="You are here: 9:49:18 Sep 24, 2006">SEP</td>
				<td style="padding-left:9px;font-size:11px!important;font-weight:bold;text-transform:uppercase;white-space:nowrap;overflow:visible;" nowrap="nowrap">
               
		                <a href="http://web.archive.org/web/20080424113529/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" style="text-decoration:none;color:#33f;font-weight:bold;background-color:transparent;border:none;" title="24 Apr 2008"><strong>APR</strong></a>
		                
               </td>
           </tr>

           <!-- NEXT/PREV CAPTURE NAV AND DAY OF MONTH INDICATOR -->
           <tr>
               <td style="padding-right:9px;white-space:nowrap;overflow:visible;text-align:right!important;vertical-align:middle!important;" nowrap="nowrap">
               
		                <a href="http://web.archive.org/web/20050323162009/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" title="16:20:09 Mar 23, 2005" style="background-color:transparent;border:none;"><img src="http://staticweb.archive.org/images/toolbar/wm_tb_prv_on.png" alt="Previous capture" width="14" height="16" border="0" /></a>
		                
               </td>
               <td id="displayDayEl" style="background:#000;color:#ff0;width:34px;height:24px;padding:2px 0 0 0;text-align:center;font-size:24px;font-weight: bold;" title="You are here: 9:49:18 Sep 24, 2006">24</td>
				<td style="padding-left:9px;white-space:nowrap;overflow:visible;text-align:left!important;vertical-align:middle!important;" nowrap="nowrap">
               
		                <a href="http://web.archive.org/web/20080424113529/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" title="11:35:29 Apr 24, 2008" style="background-color:transparent;border:none;"><img src="http://staticweb.archive.org/images/toolbar/wm_tb_nxt_on.png" alt="Next capture" width="14" height="16" border="0"/></a>
		                
			    </td>
           </tr>

           <!-- NEXT/PREV YEAR NAV AND YEAR INDICATOR -->
           <tr style="width:110px;height:13px;font-size:9px!important;">
				<td style="padding-right:9px;font-size:11px!important;font-weight: bold;text-align:right;white-space:nowrap;overflow:visible;" nowrap="nowrap">
               
		                <a href="http://web.archive.org/web/20050323162009/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" style="text-decoration:none;color:#33f;font-weight:bold;background-color:transparent;border:none;" title="23 Mar 2005"><strong>2005</strong></a>
		                
               </td>
               <td id="displayYearEl" style="background:#000;color:#ff0;font-size:11px!important;font-weight: bold;padding-top:1px;width:34px;height:13px;text-align:center;" title="You are here: 9:49:18 Sep 24, 2006">2006</td>
				<td style="padding-left:9px;font-size:11px!important;font-weight: bold;white-space:nowrap;overflow:visible;" nowrap="nowrap">
               
		                <a href="http://web.archive.org/web/20080424113529/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" style="text-decoration:none;color:#33f;font-weight:bold;background-color:transparent;border:none;" title="24 Apr 2008"><strong>2008</strong></a>
		                
				</td>
           </tr>
           </tbody></table>
       </td>

       </tr>
       <tr>
       <td style="vertical-align:middle;padding:0!important;">
           <a href="http://wayback.archive.org/web/20060924094918*/http://www.howell1964.freeserve.co.uk/Atari/tia/addresssummary.htm" style="color:#33f;font-size:11px;font-weight:bold;background-color:transparent;border:none;" title="See a list of every capture for this URL"><strong>10 captures</strong></a>
           <div style="margin:0!important;padding:0!important;color:#666;font-size:9px;padding-top:2px!important;white-space:nowrap;" title="Timespan for captures of this URL">24 May 03 - 24 Apr 08</div>
       </td>
       <td style="padding:0!important;">
       <a style="position:relative; white-space:nowrap; width:400px;height:27px;" href="" id="wm-graph-anchor">
       <div id="wm-ipp-sparkline" style="position:relative; white-space:nowrap; width:400px;height:27px;background-color:#fff;cursor:pointer;border-right:1px solid #ccc;" title="Explore captures for this URL">
			<img id="sparklineImgId" style="position:absolute; z-index:9012; top:0px; left:0px;"
				onmouseover="showTrackers('inline');" 
				onmouseout="showTrackers('none');"
				onmousemove="trackMouseMove(event,this)"
				alt="sparklines"
				width="400"
				height="27"
				border="0"
				src="http://wayback.archive.org/jsp/graph.jsp?graphdata=400_27_1996:-1:000000000000_1997:-1:000000000000_1998:-1:000000000000_1999:-1:000000000000_2000:-1:000000000000_2001:-1:000000000000_2002:-1:000000000000_2003:-1:000011000100_2004:-1:100010101000_2005:-1:001000000000_2006:8:000000001000_2007:-1:000000000000_2008:-1:000100000000_2009:-1:000000000000_2010:-1:000000000000_2011:-1:000000000000"></img>
			<img id="wbMouseTrackYearImg" 
				style="display:none; position:absolute; z-index:9010;"
				width="25" 
				height="27"
				border="0"
				src="http://staticweb.archive.org/images/toolbar/transp-yellow-pixel.png"></img>
			<img id="wbMouseTrackMonthImg"
				style="display:none; position:absolute; z-index:9011; " 
				width="2"
				height="27" 
				border="0"
				src="http://staticweb.archive.org/images/toolbar/transp-red-pixel.png"></img>
       </div>
		</a>

       </td>
       </tr></tbody></table>
   </td>
   <td style="text-align:right;padding:5px;width:65px;font-size:11px!important;">
       <a href="javascript:;" onclick="document.getElementById('wm-ipp').style.display='none';" style="display:block;padding-right:18px;background:url(http://staticweb.archive.org/images/toolbar/wm_tb_close.png) no-repeat 100% 0;color:#33f;font-family:'Lucida Grande','Arial',sans-serif;margin-bottom:23px;background-color:transparent;border:none;" title="Close the toolbar">Close</a>
       <a href="http://faq.web.archive.org/" style="display:block;padding-right:18px;background:url(http://staticweb.archive.org/images/toolbar/wm_tb_help.png) no-repeat 100% 0;color:#33f;font-family:'Lucida Grande','Arial',sans-serif;background-color:transparent;border:none;" title="Get some help using the Wayback Machine">Help</a>
   </td>
   </tr></tbody></table>

</div>
</div>
<script type="text/javascript">
 var wmDisclaimBanner = document.getElementById("wm-ipp");
 if(wmDisclaimBanner != null) {
   disclaimElement(wmDisclaimBanner);
 }
</script>
<!-- END WAYBACK TOOLBAR INSERT -->

<h1><font color="#0000FF">Address Summary</font></h1>
<h2><font color="#0000FF">Write Address Summary</font></h2>
<table border="1" cellpadding="3">
<tr>
<td align="center" colspan="2"><font color="#0000FF"><strong>6-bit<br>
 address</strong></font></td>
<td align="center" rowspan="2"><font color="#0000FF"><strong>Address<br>
 Name</strong></font></td>
<td align="center" colspan="8" bordercolor="#000000"><font
 color="#0000FF"><strong>Data bits<br>
 used</strong></font></td>
<td rowspan="2"><font color="#0000FF"><strong>Function</strong></font></td>
</tr>
<tr>
<td><font color="#0000FF"><strong>Oct</strong></font></td>
<td><font color="#0000FF"><strong>Hex</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>7</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>6</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>5</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>4</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>3</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>2</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>1</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font color="#0000FF"><strong>0</strong></font></td>
</tr>
<tr>
<td>00</td>
<td>00</td>
<td>VSYNC</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Vertical Sync Set-Clear</td>
</tr>
<tr>
<td>01</td>
<td>01</td>
<td>VBLANK</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Vertical Blank Set-Clear</td>
</tr>
<tr>
<td>02</td>
<td>02</td>
<td>WSYNC</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Wait for leading edge of horizontal blank</td>
</tr>
<tr>
<td>03</td>
<td>03</td>
<td>RSYNC</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Reset Horizontal Sync Counter</td>
</tr>
<tr>
<td>04</td>
<td>04</td>
<td>NUSIZ0</td>
<td colspan="2" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Number-Size of Player-Missile 0</td>
</tr>
<tr>
<td>05</td>
<td>05</td>
<td>NUSIZ1</td>
<td colspan="2" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Number-Size of Player-Missile 1</td>
</tr>
<tr>
<td>06</td>
<td>06</td>
<td>COLUP0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Color-Luminance of Player 0</td>
</tr>
<tr>
<td>07</td>
<td>07</td>
<td>COLUP1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Color-Luminance of Player 1</td>
</tr>
<tr>
<td>10</td>
<td>08</td>
<td>COLUPF</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Color-Luminance of Playfield</td>
</tr>
<tr>
<td>11</td>
<td>09</td>
<td>COLUBK</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Color-Luminance of Background</td>
</tr>
<tr>
<td>12</td>
<td>0A</td>
<td>CTRLPF</td>
<td colspan="2" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Control Playfield Ball Size and Collisions</td>
</tr>
<tr>
<td>13</td>
<td>0B</td>
<td>REFP0</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="3" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Reflect Player 0</td>
</tr>
<tr>
<td>14</td>
<td>0C</td>
<td>REFP1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="3" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Reflect Player 1</td>
</tr>
<tr>
<td>15</td>
<td>0D</td>
<td>PF0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Playfield Register byte 0</td>
</tr>
<tr>
<td>16</td>
<td>0E</td>
<td>PF1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Playfield Register byte 1</td>
</tr>
<tr>
<td>17</td>
<td>0F</td>
<td>PF2</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Playfield Register byte 2</td>
</tr>
<tr>
<td>20</td>
<td>10</td>
<td>RESP0</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Reset Player 0</td>
</tr>
<tr>
<td>21</td>
<td>11</td>
<td>RESP1</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Reset Player 1</td>
</tr>
<tr>
<td>22</td>
<td>12</td>
<td>RESM0</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Reset Missile 0</td>
</tr>
<tr>
<td>23</td>
<td>13</td>
<td>RESM1</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Reset Missile 1</td>
</tr>
<tr>
<td>24</td>
<td>14</td>
<td>RESBL</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Reset Ball</td>
</tr>
<tr>
<td>25</td>
<td>15</td>
<td>AUDC0</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Audio Control 0</td>
</tr>
<tr>
<td>26</td>
<td>16</td>
<td>AUDC1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Audio Control 1</td>
</tr>
<tr>
<td>27</td>
<td>17</td>
<td>AUDF0</td>
<td colspan="3" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Audio Frequency 0</td>
</tr>
<tr>
<td>30</td>
<td>18</td>
<td>AUDF1</td>
<td colspan="3" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Audio Frequency 1</td>
</tr>
<tr>
<td>31</td>
<td>19</td>
<td>AUDV0</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Audio Volume 0</td>
</tr>
<tr>
<td>32</td>
<td>1A</td>
<td>AUDV1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Audio Volume 1</td>
</tr>
<tr>
<td>33</td>
<td>1B</td>
<td>GRP0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Graphics Player 0</td>
</tr>
<tr>
<td>34</td>
<td>1C</td>
<td>GRP1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Graphics Player 1</td>
</tr>
<tr>
<td>35</td>
<td>1D</td>
<td>ENAM0</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Graphics (Enable) Missile 0</td>
</tr>
<tr>
<td>36</td>
<td>1E</td>
<td>ENAM1</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Graphics (Enable) Missile 1</td>
</tr>
<tr>
<td>37</td>
<td>1F</td>
<td>ENABL</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Graphics (Enable) Ball</td>
</tr>
<tr>
<td>40</td>
<td>20</td>
<td>HMP0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Horizontal Motion Player 0</td>
</tr>
<tr>
<td>41</td>
<td>21</td>
<td>HMP1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Horizontal Motion Player 1</td>
</tr>
<tr>
<td>42</td>
<td>22</td>
<td>HMM0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Horizontal Motion Missile 0</td>
</tr>
<tr>
<td>43</td>
<td>23</td>
<td>HMM1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Horizontal Motion Missile 1</td>
</tr>
<tr>
<td>44</td>
<td>24</td>
<td>HMBL</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td colspan="4" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr>
<td>45</td>
<td>25</td>
<td>VDELP0</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Vertical Delay Player 0</td>
</tr>
<tr>
<td>46</td>
<td>26</td>
<td>VDELP1</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Vertical Delay Player 1</td>
</tr>
<tr>
<td>47</td>
<td>27</td>
<td>VDELBL</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td>Vertical Delay Ball</td>
</tr>
<tr>
<td>50</td>
<td>28</td>
<td>RESMP0</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Reset Missile 0 to Player 0</td>
</tr>
<tr>
<td>51</td>
<td>29</td>
<td>RESMP1</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td bgcolor="#00FFFF" bordercolor="#000000">1</td>
<td bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td>Reset Missile 1 to Player 1</td>
</tr>
<tr>
<td>52</td>
<td>2A</td>
<td>HMOVE</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Apply Horizontal motion</td>
</tr>
<tr>
<td>53</td>
<td>2B</td>
<td>HMCLR</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Clear Horizontal motion registers</td>
</tr>
<tr>
<td>54</td>
<td>2C</td>
<td>CXCLR</td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000">STROBE</td>
<td>Clear Collision Latches</td>
</tr>
</table>

<h2><font color="#0000FF">Read Address Summary</font></h2>

<table border="1" cellpadding="3">
<tr>
<td align="center" colspan="2"><font color="#0000FF"><strong>6-bit<br>
 address</strong></font></td>
<td align="center" rowspan="2"><font color="#0000FF"><strong>Address<br>
 Name</strong></font></td>
<td align="center" colspan="8" bgcolor="#00FFFF"
 bordercolor="#000000"><font color="#0000FF"><strong>Data
 bits<br>
 used</strong></font></td>
<td rowspan="2"><font color="#0000FF"><strong>Function</strong></font></td>
</tr>
<tr>
<td><font color="#0000FF"><strong>Oct</strong></font></td>
<td><font color="#0000FF"><strong>Hex</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>7</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>6</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>5</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>4</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>3</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>2</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>1</strong></font></td>
<td bgcolor="#00FFFF" bordercolor="#000000"><font
 color="#0000FF"><strong>0</strong></font></td>
</tr>
<tr>
<td>00</td>
<td>00</td>
<td>CXM0P</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M0-P1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M0-P0</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td rowspan="8">Read Collision</td>
</tr>
<tr>
<td>01</td>
<td>01</td>
<td>CXM1P</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M1-P0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M1-P1</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>02</td>
<td>02</td>
<td>CXP0FB</td>
<td bgcolor="#00FFFF" bordercolor="#000000">P0-PF</td>
<td bgcolor="#00FFFF" bordercolor="#000000">P0-BL</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>03</td>
<td>03</td>
<td>CXP1FB</td>
<td bgcolor="#00FFFF" bordercolor="#000000">P1-PF</td>
<td bgcolor="#00FFFF" bordercolor="#000000">P1-BL</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>04</td>
<td>04</td>
<td>CXM0FB</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M0-PF</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M0-BL</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>05</td>
<td>05</td>
<td>CXM1FB</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M1-PF</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M1-BL</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>06</td>
<td>06</td>
<td>CXBLPF</td>
<td bgcolor="#00FFFF" bordercolor="#000000">BL-PF</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>07</td>
<td>07</td>
<td>CXPPMM</td>
<td bgcolor="#00FFFF" bordercolor="#000000">P0-P1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">M0-M1</td>
<td colspan="6" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>10</td>
<td>08</td>
<td>INPT0</td>
<td bgcolor="#00FFFF" bordercolor="#000000">I0</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td rowspan="4">Read Pot Port</td>
</tr>
<tr>
<td>11</td>
<td>09</td>
<td>INPT1</td>
<td bgcolor="#00FFFF" bordercolor="#000000">I1</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>12</td>
<td>0A</td>
<td>INPT2</td>
<td bgcolor="#00FFFF" bordercolor="#000000">I2</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>13</td>
<td>0B</td>
<td>INPT3</td>
<td bgcolor="#00FFFF" bordercolor="#000000">I3</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
<tr>
<td>14</td>
<td>0C</td>
<td>INPT4</td>
<td bgcolor="#00FFFF" bordercolor="#000000">I4</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
<td rowspan="2">Read Input</td>
</tr>
<tr>
<td>15</td>
<td>0D</td>
<td>INPT5</td>
<td bgcolor="#00FFFF" bordercolor="#000000">I5</td>
<td colspan="7" bgcolor="#C0C0C0" bordercolor="#000000">&nbsp;</td>
</tr>
</table>

<p><font color="#0000FF"><strong>Note:</strong></font><br>
I0, I1, I2, I3 can be grounded under software control.<br>
I4, I5 can be converted to latched inputs under software control.</p>

<p><a href="http://web.archive.org/web/20060924094918/http://www.howell1964.freeserve.co.uk/Atari/tia/index.htm">Contents</a> | <a
href="http://web.archive.org/web/20060924094918/http://www.howell1964.freeserve.co.uk/Atari/tia/addressdetails.htm">Previous</a> | <a href="http://web.archive.org/web/20060924094918/http://www.howell1964.freeserve.co.uk/Atari/tia/schematic.htm">Next</a></p>
</body>
</html>





<!--
     FILE ARCHIVED ON 9:49:18 Sep 24, 2006 AND RETRIEVED FROM THE
     INTERNET ARCHIVE ON 15:21:01 Jun 17, 2011.
     JAVASCRIPT APPENDED BY WAYBACK MACHINE, COPYRIGHT INTERNET ARCHIVE.

     ALL OTHER CONTENT MAY ALSO BE PROTECTED BY COPYRIGHT (17 U.S.C.
     SECTION 108(a)(3)).
-->
